Skip to main content

Batch#01 - 24 Dec - Day 15

Christmas Eve! Time to find out more about lettuce tip burn


Signs of tip burns (especially at the crown or youger leaves)



More signs of tip burn only on the GR. Interestingly, the other lettuces do not exhibit any similar signs. This may point to other causes, other than EC level, pH or even dew droplets. An important point to note is that GR leaves are much thinner and seemingly more fragile compared to the other lettuces in the system.

An internet search yielded this article. 

To summarize the key points of the article, it would seem that tip burn can be caused by calcium deficiency. However, for selected lettuce (iceberg), tip burn at the crown or young leaves, can still happen despite sufficient calcium supply. This is most likely caused by rapid growth which creates a condition that reduces the transpiration ability in the inner leaves. This lack of evapotranspiration is the main cause of tip burn in selected lettuce types.

 The only way to manage is to cultivate other types of lettuce apparently!

So it seems I just got to live with the issue. More important to note, is to keep vigilant and check that the tip burns or identical looking signs are not caused by other factors, such as pest infestation or moulds!

The traditional sequence from top to bottom.

CR:


GR:



RO:



BH:



EC980
- Still in good range.

pH6.7
- The trend of increasing pH remains consistent. Added 4 drops of pH down around 0800h. Reading at 1700h is 6.6. Added another 4 drops.

WT29
- Fairly consistent between 29 and 30C.






 



Labels:

Comments

Post a Comment

Popular posts from this blog

Batch 2 - Transplant Cycle 2

Transplant Cycle 2 Transplanted an assortment of GL and L211 mix that is about 7 days old. These came from seeding that was done on 9 May. Leftover sprouts.  Tried to grow Chinese Kale via Kratky using the wicking method planter pots and two 20W E27 grow lights. A close up of the CK sprouts.
Post a Comment
Read more

Batch#01 - 26 Dec - Day 17

Boxing Day Wondergreens Greens are growing great and with the state of the GR, I am thinking of thinning them out tomorrow. Get the younger ones, one each per pot for brekkie salad. Tier 1: CR Leaves are deep green in colour, a slight contrast to the usual romaine that we have for salad from the markets. All looking healthy though. Another observation, the leaves are open. Tier 2: GR Observed some minor tip burns, but not too many to be of concern for aesthetics. Tier 3: RO The leaves are losing the reddishness. The pace of growth is slower than both the CR and GR. To take note of this when planning for sustainable supplies. Internet sources suggest that maturity is between 45 to 60 days. Tier 4: BH Growing well too. No burn tips. Judging from plant size (diameter and height), growth rate seems to be just a little slower compared to GR and CR.    Data EC1200 - Nice! After adding the 10ml of ABC yesterday together with the 2L of water. Overnight mixing has resulted in a higher ...
Post a Comment
Read more

Batch#01 - 31 Dec - Day 22

HARVEST TIME! GR for New Year's eve dinner! Finally harvested 134.9g of Grand Rapids for dinner! The before, harvest and after look! Leaving some leaves for brekkie tomorrow! From the top to bottom again: Cos/Romaine: The Grand Rapids or what's left over! Red Oak: Butterhead: Data: (before harvest) EC1146 pH6.93 - once again, the pH crept up again, despite adding 6 drops of down yesterday. Time to adjust it downwards once again. - added 10 drops of pH down. WT29 Water Level: at MIN level again. - Topped up with another 2L with 10mL of ABC. Adjusted with 6 drops of Down.
Post a Comment
Read more